[cinder] wallaby R-18 virtual mid-cycle on 9 december

As voted upon at today's weekly meeting, the Cinder Wallaby R-18 virtual mid-cycle will be held: DATE: WEDNESDAY 9 DECEMBER 2020 TIME: 1400-1600 UTC LOCATION: https://bluejeans.com/3228528973 The meeting will be recorded. Please add topics to the mid-cycle etherpad: https://etherpad.opendev.org/p/cinder-wallaby-mid-cycles cheers, brian